Pin-tumbler lock



B. B. FREYSINGER.- PIN TUMBLER LOCK- APPLICATION FILED MN.19,'1922.

hmnm Oct 4; W22.

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Application filed January 19, 1922. $Cll2ll No. 530,336.

To a. whom itfinutj mace m: Be it known that LIJOIIN l IMUQYSIQG- nu, a citizen of the United tltates, and a resident of Stan'i't'ord, inthe county of Fair- -lield and State otC onnecticut, have invented certain new and useful ihnprovemerits in Pin-'lfumbler Locksg and Ido hereby declare the following to be a lull, clear, and exact description 01? the invention,such as will. enable others skilled in the art to which it appertains to make and use the same; 4 i

lily invention relates toan improvement in pin tumbler locks, the object being to construct the cylinder and plug of stamped and? folded sheet metal, so as to provide a strong; and satisfactory lock ata minimum. or expense, and it consists of the parts and combination ofiparts as will be more fully explained andpointed out in the claims.

.is a view in. longitudinal section of one torni of cylinder and tuinbler and tun'ibler driver after referred to indetail.

housing enibodyinginy invention; Figure 2,

a view in transverse section of the same Figures 3, 4 and 5 are views in transverse section of modified forms; Figure 6 is a view in transverse section andFigure T a View in plan of another modification; Figure 8 is a view in plan of the blank from which the key plug is made; Figure 9 is a view in longitudinal section of same and showing, indotted lines the blank folded to produce the plug; Figure 10 is a view in plan and also end elevation and Figure 11 a view in longitudinal section and also a transverse section of the key plug.

. lin the construction disclosed in Figures 1 to inclusive, 15 represents the cylinder made oi? tubing or sheet metal, bent into circular form to receive a plug 16 which is perferably constructed as shown in Figures 8 toll inclusive, and which will. be herein In the construction shown in Figuresl, 2 and 4:,the edge of the sheet from which the cylinder 15 is formed, are preferably united till by brazing or otherwise, and the cylinder is provided witha plurality of holes 17 for the passage of the pin tumblers not shown, but which may be of the well known type. 18

is the pin or tumbler housing, which may be made of a solid blockas shownin Figures 1 to 5inclusive,rigidly secured to the cylinder. This housing 18 is provided with a plurality oi. tumbler chambers ll) connnunieating With the tumbler openings 17 111 cyllnder i123, and-the housing may be secured to the cylinder by the rivets 2O passing through the ends oi? thel'iousing l8 and adjacent wall oil the cylinder 15, or the housing may have Hanged side edges 21 curved toconiorno to the contom' of the cylinder and secured to the latter by rivets 22. litistead howeverol. riveting the tumbler housing to the cylinder,

the latter may beleit open at the top to receive the lower edge of the housing, and the two secured together by sprezuling the opizulend oi the housing from the inside as shown in Figure 3 so as to underlap the edges of the cylii'ider, or the housinglnay be grooved to receive flanged edges of the cylinder as shown in F igure 5.

' Instead of making he tuln pendent tubes, one for each tumbler, as

bler housing of 1a single block, I may use a series of lllClBw shown-in Figures 6 and 7, the open ends of formed in the cylinder;

The cylinder and tumbler housing thus formed are secured to the face plate of the lock (not shown) in any approved manner. The keyplug 16 is also of sheet metal and is made from a blank 23 shown in Figure 8. This blank is rectangular in shape with slightly lurrrowed or reduced ends 24: which are fluted. as shown at 24 and is provided with an. elongated central tansverse open- 'ing 25 which receives the reduced ends 244 when. the blank23 is folded into cylindrical form as shown in dotted lines in Figure 9.

the tubes beingthreaded or driven into holes The flutes or curved seats 24* in the reduced the two ends aline or come together to form the housing for the drivers and tumblers. The walls of the curved tumbler housings are so shaped or provided with projections as shown at 26, in Figures 9 and 11, to obstruct the key way and prevent theentranc'e of any key not grooved or otherwise shaped to receive and pass the said obstruction. The plugthus formed is closed atits outer end by the face plate 27 riveted to two or more lugs 28 integral with the end of the cylinder and projecting therefrom, the said s having a key slot conforming in slot in the plug.

his construction the cylinder and fnnped from any thin, rolled or erewn n ill to the exact size so that when assembled the plug will have a close lit in the cylinder thus greatly reducing the cost of manufacture without sacrificing strength or durability in the finished lock.

Having fully described my invention what I cleiin as new and desire to secure by Lettcrs lutent, is

1. In e pin tumbler lock the combination ct a sheet metal cylinder having tumbler openings tumbler housing separate therefrom and secured to the same, the tumbler housin phnving tumbler, openings in elinement with the-openings in the cylinder, and a sheet metal plug the ends of which are bent inwardly to form the key slot.

2. In a pin tumbler lock, the combination of n. sheet metal cylinder having tumbler holes, tumb housing separate from said cylinder and secured to the same, and also provir ed With tumbler openings, 21. key plug made-0f bendable metal and having tumbler openings aeepted to eline with the openings in the said cylinderend housing, the ends of said plug being bent inwardly to form the key slot in the plug.

3. In a pin tumbler lock, the combination of a sheet metal cylinder having holes for the tumblers, tumbler housing separate from said cylinder and secured thereto the said housing havingtumbler holes in line with the holes in cylinder, and a sheet metal key plug); provided with tumbler openings :idoglted to aline with the tumbler openings in the cylinder, the ends o'l. said sheet metal plug; being bent inwardly to form a. key slot end fluted to term recessed seats tor the tumblers.

l. A key plug for a pin tumbler lock made t'rom sheet metal blank having. reduced ends and a centrally located transverse slot,

the reduced ends being fluted, the said blank being bent into cylindrical. term and the reduced fluted endspasscd centrally through the cylinder and into the slot to form rccesses or seats for the tun'iblcrs and also a.

key slot for the key.

5. Ii hey plug for pin tumbler locks made from a sheet metal blank having reduced ends the latter being fluted and provided with projections, thesaid blank being bent 

